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flag In 2025, oceans absorbed a record heat amount due to human emissions, worsening extreme weather and sea level rise.

flag In 2025, the world’s oceans absorbed a record 23 zetta joules of heat—the highest on record—driven by human-caused greenhouse gas emissions, according to a major international study. flag This heat, primarily stored in the upper 2,000 meters, contributed to rising sea levels, intensified storms, and extreme weather, including severe flooding in Southeast Asia and Mexico and droughts in the Middle East. flag About 16% of the ocean surface reached record heat levels, with another 33% among the warmest on record, particularly in the tropical and South Atlantic, North Pacific, and Southern Ocean. flag Scientists emphasize that ocean heat content remains the most reliable measure of Earth’s energy imbalance, and continued warming is expected as long as excess heat accumulates.

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